verify-set

verify-set is a skill for Claude Code, Codex from wingedsheep/argentum-engine. It costs 152 tokens per session (4,271 once invoked), scanned A, original, no licence file.

A completion checker for a Magic: The Gathering card set. It compares the implementation with Scryfall, a database of Magic card data, and checks cards, fields, scripts, tokens, and behaviour before archiving the set's backlog.

In plain words
What is it for?
Use it to verify a set card by card, run its checks, and close the remaining implementation backlog when the set passes.
Why use it?
It helps catch missing cards, incorrect card details, broken rules behaviour, and unresolved token or artwork references before the set is considered finished.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/wingedsheep/argentum-engine/verify-set
Any agent
npx skills add wingedsheep/argentum-engine --skill verify-set
Clone the repo
git clone --depth 1 https://github.com/wingedsheep/argentum-engine

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for verify-set

README.md
[![agentmods](https://agentmods.dev/badge/skills/wingedsheep/argentum-engine/verify-set.svg)](https://agentmods.dev/skills/wingedsheep/argentum-engine/verify-set)
Your own site
<a href="https://agentmods.dev/skills/wingedsheep/argentum-engine/verify-set"><img src="https://agentmods.dev/badge/skills/wingedsheep/argentum-engine/verify-set.svg" alt="Measured on agentmods" height="20"></a>
Per session 152 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,271 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00152 $0.04271
Opus 5 $0.00076 $0.02135
Sonnet 5 $0.00030 $0.00854
Haiku 4.5 $0.00015 $0.00427

Measured 5d ago against content hash 46de0f6100a4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

verify-set scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s "https://api.scryfall.com/cards/search?order=set&unique=prints&q=e%3A$CODE" \
.agents/skills/verify-set/SKILL.md · 280 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 280 lines · 152 tokens per session scan A 46de0f6100a4

Subscribe to this mod's changes

verify-set is a skill published in the GitHub repository wingedsheep/argentum-engine (64 stars, last pushed today), with no licence file. It adds 152 tokens to every session and 4,271 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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